Try and catch blocks.

vbboyd · May 21st, 2011, 11:24 AM

Can you nest try blocks within other try blocks and then have catch blocks nested withing those different nested try blocks? Also on debuging I noticed that the page will sometimes go to the basepage.cs into the pre-render part of the webfolder. Why is this going on here?

ChristianNagel · May 21st, 2011, 11:42 AM

Yes, you can nest multiple try blocks:

Code:

try
{
   try
   {
   }
   catch (SomeException ex)
   {
   }
}
catch (SomeException ex)
{
}

Nesting of try blocks happen for example if you do a try/catch within method Foo, and method Bar invokes method Foo, and the Bar method has a try/catch as well.

What catch is taking over depends. For example, if a throw happens inside the inner try block first the inner catch gets a chance for catching the exception. If the exception type is different of the inner catch, the exception goes to the next outer try. If the exception is caught within the inner catch there's still a chance that the next outer catch continues if the inner catch re-throws the exeption.

Hope this helps,
Christian